Roni Horn is an American visual artist and writer. She explores the mutable nature of art through sculptures, works on paper, photography, and books. She describes drawing as the key activity in all her work because drawing is about composing relationships. Horn’s drawings concentrate on the materiality of the objects depicted. She also uses words as the basis for drawings and other works. Horn crafts complex relationships between the viewer and her work by installing a single piece on opposing walls, in adjoining rooms, or throughout a series of buildings.

Since 1975 Horn has traveled often to Iceland, whose landscape and isolation have strongly influenced her practice. "Some Thames" (2000), a permanent installation at the University of Akureyri in Iceland, consists of 80 photographs of water dispersed throughout the university’s public spaces, echoing the ebb and flow of students and learning over time at the university.

In November 2009, the Whitney Museum of American Art opened a survey show of Horn’s work which will be open until the end of January 2010. The title of the show is "Roni Horn aka Roni Horn". The Whitney is the third venue of this show after the Tate Modern, London (25 February - 25 May 2009) and the Colection Lambert in Avignon (21 June - 4 October 2009).